Improvement in valves



K r 2 Sheets-Sheet 1.

G. H. LITTLBv J. S. SMART.

Valve.

Patented March I9, 18,78..

A 2 sheets-sheets. G. H. LITTLE &J. S. SMART.

Valve. No. 201,352. Patented March 19,1878. v

not cut, and it isv applicable to valves generdevices which would make a satisfactory tight ting of the seat; but in our invention we pro- UNTTEDISTATEs PATENT OFFICE.

I GEORGEH. LITTLE, or PEABODY, AND JAMEs sl SMART, on sALEM,

' MAssAcHUsETTs.

l-M PROVENIENTI-'IN VALVES.-

Speciiicationforining part of Letters Patent No. 201,352, dated March 19, 187B; application `filed December To all 'whom it may concern:

Be it known that we, 'GEORGE H. LTTTLE, of Peabody, and JAMES S. SMART, of Salem, both in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Valves, which improvements are fully set forth in the following specification.

Our invention has for its object the making of ,a tight valve which steam or liquids will ally, including check-valves, gage-cocks, and faucets; and to thisend it consists in a doubleseated valve, both of the seats seating at the same time, one being of larger diameter'than the other, and with an expanding chamber located between them, and a plug, which, while adapted to seat upon both said seats, also iills, or nearly lls, the expanding chamber.

It has long been'a desideratum to produce valve for steam and liquids; but, so far as we are aware, it has not hitherto been done. But our present invention accomplishes this end or purpose, and overcomes the difficulties heretofore experienced. Among these difculties may be named the cutting of the valve, and also the cutting of the valve-seat.

In some cases means have been devised seeking to remedy the cutting of the valve, and in other cases means for avoiding the cutvide for both, and construct and arrange both the valve and its seat, as hereinafter described, so that the steam or liquid will not cut either of them.

In the drawings we have shown valves adapted for different uses, but to each and all of which our improvement is applicable.

The same letters refer to similar parts in all the figures.

Figure 1 represents a valve embodying our invention, A being the body of the valve B, the passage or opening through the same connecting the inlet with the outlet c, the lower seat, which is also the smaller and inner one 5 d, the upper seat, 'and which is also the outer one, and of the larger diameter; e, the expanding chamber located between these two seats, 1t being, of course, understood that this chamber may be of any desired dimensions and the distance or height between these two seats varied, as'v circumstances or the character of the valve may demand, but always provided that the passage B be of lesser diameter'than the chamber e. F represents the double valve stem or plug, of which g represents the tight or nearly tight fitting plug portion o'f the valve, and which fills, or nearly lls, the .expanding chamber e; and h and 't' represent, respectively, the two valve-seats of this plug, of which h (the upper and larger one) is adapted to seat upon the seatd, above described, and i (the lower and smaller one) is adapted to .0, above described.

As shown inFig. 1, tlieseats are'beveled in form, c beveling inward and d beveling out-l ward, and the plugl F has its seats also beveled correspondingly, but these seats may be flat, instead of beveled, both in the body of the valve and in the plug, provided there be two seats, and that the seating be simultaneously made by both seats. The beveled form, however, I prefer, because it affords a tapering contact of the surfaces, acting in the nature of a wedging action when tightening or closing the valve.

From this construction the following ad! vantageous results follow, as will be readily seen, namely: First, the valve has not only a double-seating but also a tight-fitting plug, and this plug located between the two seats; second, the upper seat d is made in such man ner that the steam will not come in contactwith it; third, the plug g, being tight fitting in the expanding chamber e, allows but a very small amount (if any) of steam to escape until the valve is wholly removed from said chamber, and is away from the opening B of the valve-seat. Therefore it allows the steam to pass up and out of the valve without cutting either of the two seats.

The seats may be made of any metal or composition adapted or suitable for making a tight joint.

In Fig. 1 is shown a valve. In Fig. 2 is shown a checkvalve 5 in Fig. 3, a gage-cock; in Fig. 4, a faucet, all having our invention applied therein, the double seat and the inter:

seat upon the seat Y 1 Y venng chamber: being Y shown-.rin -aL-Y :fn Y Y Y i 5 the Valve: shows om expanding' chamber' YY Y Yhavngene seat instead; .ofitwo bnt :with the;

Y Y Y :tght-tting 'plug Vadapted to flll saidV expanc; a Y Y Yngehamberbelowthe seat; `Y Y Y Y 1 1 Y Y Y Y Y Inl alli the Ygjure's Sit Ywi be 2 observed that 1 Y i Y Y the expanding ohamben e1 isef greater diaree-Y 1 1 r ;terithan thezopening B,"whieh:1attendetermnes1 'Y2'ithesiizeiofthelvalvefY'YYYY'-YYY-1YY:'.Y Y Y Y Y In aY one-inch? vave-#tbat Y is, one in which Y the opening Bhas a diameter of one@ inchthe Y Y Vdiameter of the expanding ehrmoerY e and' of 1 Yaepmgwhieh nes n; win be greater. Y new Y Y moving or aisnYgY the plug" away from the Y i tages incident Y to YsnchV ia ehalnhen could not:

ject threngh Yan'fl beyond'the epenngg 2 1 Y Y Y Y Y Y in which theYsteam Ywl not pass y:the Valve 'at Y thef ins-tenftithe Ylatten Yeonmenees YtoYlft er to' To form oueexpanson-ehamber, it is neces: Y

Y npening YB :it Y does: Vnet Y permit the :steam Yer Y Y Y iquidtoent 'er YrakeY the vave as the plug Y Y being raised-Y ont: of the expaneien-ehamileengY Y Y r i but it cheeks :Y it in Ypart Y before 'it lea-Ves the .Y Y Y Y chamber, and: reclnees Ythe :harshness of the Y iY steam'aandtiis not-seable to ent, Y Y; Y Y Y Y Y Y Y Y Y Y Y it will be seen Ythat' fthe Y opening BY' were r: ii Y of the sameidiameter; as the 'part e, the atter Y Y ywend cease to; be 1a, Y-ohamber-,- and the advan-1 1.

Y attach to Ya'valveof sneh construetien. Y Y 1 1 Y 1 Y Y Yt will' also Y- be seenY than fin :no instanee,1 in ,Y

:the hole through the nave; and proved with Y 1 Y Y onzeY mode of: nonstrinetion, neef the 'plug YpnoY 'a tight er nearly tight zitting; plug; operating 1 1 1 i Yt preventthegsteamfem passing'beyezrlzditV Y ,Y YY Yu'ntlrts removedYfI-emsnehgexpaningehem1 1 1Y Yeer',forYtheipurposedeserbedYY 1Y; Y Y Y Y AY donblefseated valve and Yplngyethel: Y11YY Y Y be fted'; but 'this yidees not constitute kYan keX-Y Y 2 Y Y 'We are aware that Valves Yhave .been made -YA valve provided with; 1an expansioni YY Y Y ehambef ef idialneteri greaten than Ythegvalve` Y Y -.Y YY 1 opening, Yandwtha; png or stern adapted to 1 Y 1 1 Y Y 1 Y 1 :fit :tightly `:inf sueh Yehalneri substantially as Y 1 Y Y Y 1 Y Y Y Y Y :andferthe purpose Ydeselfbedf1 YYY-Y Y11YY11Y --Y Y Y Y 1: AYdeube-'seated valve: having one gopenf 1 Ying foirYboth tseataand Y-bothY eeatngenrfaees Y 1 Y Y 1 1 Y 1 Y Y Y adaptedto Seat simultaneously,neombinatien YWthY a Ytight er' YnearyV tight gttngYplugY for Y 15 1 Y Y Y 1 Y the chamberYbetweensuehsseats,-;substantialy Y Y Y Y Y Y Y Y Y Y zas and for the purpose set ertht Y Y1 YY11YY YYY YYYY Y Y 3.Y Thetwo valveseats e and (1172,11 and the eX-Y 1 1 Y 1 1 Y 1 Y Y rpanting eihazinberV kprovided with the-opening g 1 Y Y Y Y Y Y Y 1 B1therein,Ysnbstantay as Ysa1'etv1:.-1and1y de- ;Y 1 1 Y Y "SCr-hedfti :YY': 'Y Y'i1'1' 1 'Y Y'hepugfvalve g,eonstruetedwith its-two:

iseatin gY-snrfaees 1 and f,4 and the tight-nain g1 plug portioninY combination with 1 the Yspin-Y idle for; 'operating the yYvalve, substantially as Y Y Y shawn and deserbeeLY 1 1 Y Y Y Y Y YY1; i5.' YiAnahre'havingaftightfttingY plug in anY Y Y Y Y 1 Y 1 Y 1 expanding ehamben1 Yloeated; above the valve-YY; i -Y f Y V6; YA; valve; provided Y with ani opening YOIY Y Y l Y Y Y Y Y Y ehanneer,Y e; Eof larger diameter than Ytlat of YY Y with a .Ybeve ora fiat seat, and; provef with anYexpansien-eharnberibetween YtheYseatesub-.I Y-

1 Y 1.@ g 'Y Y Y Y stantialy as shown anddeseribed. Y 1 1Y1Y 1 lmeonen n. YLl'nlinn. V JAMES S. SMART.

Witnesses:

L. W. KELLEY, WILLIAM A. PITTs. 

